Dust separator and filter



N w O R B E R DUST SEPARATOR AND FILTER Filed Jan. 8, 1945 IBVLNTOR-a Ram-mic L BMWN HTTORNEV.

Patented Mar. 9, 1 948 ears DUST SEEARATOR AND FILTER Richard E. Brown, South Euclid, Ohio, assigncr to Air-Maze Corporation, Cleveland, Ohio, a

corporation of Delaware Application January 8, 1945, Serial No. 571,767

2 Claims. 1

This invention relates to improved means for separating dust from a gaseous stream and relates particularly to dust separators of the vertex-chamber type.

One of the objects of the present invention is to thoroughly mix a dust-bearing gaseous stream with an adhesive liquid such as oil or the like while the gas is swirling in the vortex so as to more eificiently eliminate the dust from the stream. Other objects and advantages of the invention will be apparent from the accompanying drawings and specification, and the essential features thereof will be set forth in the claims.

In the drawings,

Fig. 1 is a central vertical section through one form of my device; while Fig. 2 is a transverse sectional view of the same taken along the line 2--2 of Fig. l.

The large cylindrical tube i0 is open at the bottom as indicated at Ilia and is there provided with the attached cover member H which is adapted to have a threaded connection with a liquid reservoir 12. In this reservoir is a pool of liquid l3 adapted to act as a dust adhesive. As is well known in this art, oil, glycerine and other materials are well known for this purpose. Entering at the top of tube i0 and extending downwardly therein is the smaller cylindrical tube :4 which is open top and bottom and provides an annular gas inlet chamber l5 between the tubes ill and M. The top of this annular chamber is sealed as indicated at lib and gas inlet means is provided as indicated at It, the same being so arranged that the incoming gas stream is given 9, whirling motion within the annular chamber H5 in the direction of the arrow A indicated in Fig. 2. While only one gas inlet has been shown, it is obvious that more may be pro vided if necessary. Preferably, the lower end of tube [4 is below the bottom of the inlet opening it as clearly seen in Fig. 1. The lower portion of tube H] beneath tube it provides a vortex chamber where the whirling gas stream throws the dust outwardly to the cylindrical walls, and the dust passes downwardly along these walls to a receiving chamber below tube Hi.

The principle of the flow of the gas stream is illustrated diagrammatically in Fig. l by means of the spiral curves there indicated. The gaseous stream entering at It follows the larger spiral curve I! near the walls of the tube 89. This spiral travels downwardly as indicated'by the arrows on the curve I! to the bottom of tube it where the spiral is constricted to pass through the narrow opening Illa. My device will operate 2 without this narrow constriction at this point, but I find the eficiency of my device is increased by forming the frusto-conical wall at 10c at the bottom of tube I9 50 as the converge the walls gradually to the relatively small opening Illa. After passing through the opening ma, the whirling stream again expands as indicated by the curve Na and travels downwardly until it strikes the liquid l3. Some of this liquid is picked up by the stream and thrown against the walls lZa of the liquid reservoir thoroughly coating the walls and causing the dust to adhere thereto. The gas stream then begins to move upwardly along the smaller spiral curve l8 and continues in the path through the center of tubes Ill and Hi until it finally is discharged at the outlet Ma. This stream in passing upwardly through the opening Ilia carries some of the liquid from the pool l3 up into the tube [0, and I find that the walls of the tube become coated with the liquid up to a point level with the bottom of tube l 4. This coating on the inner walls of the lower portion of tube i i! aids greatly in increasing the efliciency of my device. I believe this increase in efficiency is due to the fact that the dust particles in the gaseous stream are caused to adhere to the liquid-coated wall of tube Ill, and the dust is carried downward by the liquid returning to the reservoir [2. This action is continuous so long as a gaseous stream is passing through my device. In other words, it appears that some of the liquid I3 is continuously being carried up into the lower portion oftube ll) where it washes down along the walls and carries the dust particles into the liquid pool in the bottom of the reservoir 12. Also, where the liquid draining from the edges of the opening llla'and dropping toward the pool l3, there is provided an intimate mixture between the liquid and the dust-bearing gaseous stream. It will be noted that an easily detachable connection as indicated by the threads 49 is provided between the liquid reservoir I 2 and the flange H connected with the bottom of tube It. It is thus easy to remove the liquid reservoir for the purpose of emptying the dirt liquid and replenishing the same with clean liquid. It will be understood by those skilled in this art that the outlet lid is generally permanently connected to some conduit through which the clean gas stream is intended to flow and that either a source of suction is connected with Ma or the gas entering at it is under a pressure for the purpose of inducing the flow above described. In such a case, it is obviously an advantage to be able to 3 renew the liquid I3 without disturbing the conduit connections to the tube ID or M.

What I claim is:

1. Means for separating dust from a stream of gas comprising a cylindrical tube open at the bottom, a second cylindrical tube extending within and downwardly from the top of said first tube to provide an annular inlet chamber, there being a space in said first tube beneath the lower end of said second tube providing a vortex chamber there, there being a gas inlet opening leading into said annular chamber, said second tube having an open bottom and top whereby a gas outlet is provided at the top thereof, and a liquidcontaining reservoir in closed communication with the open bottom of said first tube, whereby the gas stream is given a whirling motion in said annular and vortex chambers causing liquid in said reservoir to be mixed with said gas and thrown against the walls of said reservoir and said vortex chamber to increase the dust separating action of said means.

2. The combination of claim 1 including a converging passageway leading from said vortex chamber into said reservoir compelling intimate mixture of gas-borne dust and liquid.

RICHARD E. BROWN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

